Merge branch 'main' into main

Author: santhoshe447

clang-tools-extra/clang-tidy/ClangTidy.cpp

@@ -55,7 +55,9 @@ namespace clang::tidy {
 
 namespace {
 #if CLANG_TIDY_ENABLE_STATIC_ANALYZER
-static const char *AnalyzerCheckNamePrefix = "clang-analyzer-";
+#define ANALYZER_CHECK_NAME_PREFIX "clang-analyzer-"
+static constexpr llvm::StringLiteral AnalyzerCheckNamePrefix =
+    ANALYZER_CHECK_NAME_PREFIX;
 
 class AnalyzerDiagnosticConsumer : public ento::PathDiagnosticConsumer {
 public:
@@ -351,10 +353,9 @@ ClangTidyASTConsumerFactory::ClangTidyASTConsumerFactory(
 static void
 setStaticAnalyzerCheckerOpts(const ClangTidyOptions &Opts,
                              clang::AnalyzerOptions &AnalyzerOptions) {
-  StringRef AnalyzerPrefix(AnalyzerCheckNamePrefix);
   for (const auto &Opt : Opts.CheckOptions) {
     StringRef OptName(Opt.getKey());
-    if (!OptName.consume_front(AnalyzerPrefix))
+    if (!OptName.consume_front(AnalyzerCheckNamePrefix))
       continue;
     // Analyzer options are always local options so we can ignore priority.
     AnalyzerOptions.Config[OptName] = Opt.getValue().Value;
@@ -476,7 +477,8 @@ std::vector<std::string> ClangTidyASTConsumerFactory::getCheckNames() {
 #if CLANG_TIDY_ENABLE_STATIC_ANALYZER
   for (const auto &AnalyzerCheck : getAnalyzerCheckersAndPackages(
            Context, Context.canEnableAnalyzerAlphaCheckers()))
-    CheckNames.push_back(AnalyzerCheckNamePrefix + AnalyzerCheck.first);
+    CheckNames.emplace_back(
+        (AnalyzerCheckNamePrefix + AnalyzerCheck.first).str());
 #endif // CLANG_TIDY_ENABLE_STATIC_ANALYZER
 
   llvm::sort(CheckNames);
@@ -668,18 +670,19 @@ getAllChecksAndOptions(bool AllowEnablingAnalyzerAlphaCheckers) {
     Buffer.append(AnalyzerCheck);
     Result.Checks.insert(Buffer);
   }
-  for (std::string OptionName : {
+
+  static constexpr llvm::StringLiteral OptionNames[] = {
 #define GET_CHECKER_OPTIONS
 #define CHECKER_OPTION(TYPE, CHECKER, OPTION_NAME, DESCRIPTION, DEFAULT,       \
                        RELEASE, HIDDEN)                                        \
-  Twine(AnalyzerCheckNamePrefix).concat(CHECKER ":" OPTION_NAME).str(),
+  ANALYZER_CHECK_NAME_PREFIX CHECKER ":" OPTION_NAME,
 
 #include "clang/StaticAnalyzer/Checkers/Checkers.inc"
 #undef CHECKER_OPTION
 #undef GET_CHECKER_OPTIONS
-       }) {
-    Result.Options.insert(OptionName);
-  }
+  };
+
+  Result.Options.insert_range(OptionNames);
 #endif // CLANG_TIDY_ENABLE_STATIC_ANALYZER
 
   Context.setOptionsCollector(&Result.Options);

clang-tools-extra/clang-tidy/abseil/AbseilMatcher.h

@@ -46,12 +46,12 @@ AST_POLYMORPHIC_MATCHER(
   if (PrefixPosition == StringRef::npos)
     return false;
   Path = Path.drop_front(PrefixPosition + AbslPrefix.size());
-  static const char *AbseilLibraries[] = {
+  static constexpr llvm::StringLiteral AbseilLibraries[] = {
       "algorithm", "base",     "container", "debugging", "flags",
       "hash",      "iterator", "memory",    "meta",      "numeric",
       "profiling", "random",   "status",    "strings",   "synchronization",
       "time",      "types",    "utility"};
-  return llvm::any_of(AbseilLibraries, [&](const char *Library) {
+  return llvm::any_of(AbseilLibraries, [&](llvm::StringLiteral Library) {
     return Path.starts_with(Library);
   });
 }

clang-tools-extra/clang-tidy/bugprone/ComparePointerToMemberVirtualFunctionCheck.cpp

@@ -25,7 +25,7 @@ namespace {
 
 AST_MATCHER(CXXMethodDecl, isVirtual) { return Node.isVirtual(); }
 
-static const char *const ErrorMsg =
+static constexpr llvm::StringLiteral ErrorMsg =
     "comparing a pointer to member virtual function with other pointer is "
     "unspecified behavior, only compare it with a null-pointer constant for "
     "equality.";

clang-tools-extra/clang-tidy/cppcoreguidelines/ProTypeMemberInitCheck.cpp

@@ -373,8 +373,8 @@ static bool isEmpty(ASTContext &Context, const QualType &Type) {
   return isIncompleteOrZeroLengthArrayType(Context, Type);
 }
 
-static const char *getInitializer(QualType QT, bool UseAssignment) {
-  const char *DefaultInitializer = "{}";
+static llvm::StringLiteral getInitializer(QualType QT, bool UseAssignment) {
+  static constexpr llvm::StringLiteral DefaultInitializer = "{}";
   if (!UseAssignment)
     return DefaultInitializer;
 

clang-tools-extra/clang-tidy/modernize/TypeTraitsCheck.cpp

@@ -15,6 +15,9 @@ using namespace clang::ast_matchers;
 
 namespace clang::tidy::modernize {
 
+// FIXME: Add chrono::treat_as_floating_point_v and chrono::is_clock_v.
+// This will require restructuring the code to handle type traits not
+// defined directly in std.
 static const llvm::StringSet<> ValueTraits = {
     "alignment_of",
     "conjunction",
@@ -28,6 +31,7 @@ static const llvm::StringSet<> ValueTraits = {
     "is_array",
     "is_assignable",
     "is_base_of",
+    "is_bind_expression",
     "is_bounded_array",
     "is_class",
     "is_compound",
@@ -40,10 +44,14 @@ static const llvm::StringSet<> ValueTraits = {
     "is_destructible",
     "is_empty",
     "is_enum",
+    "is_error_code_enum",
+    "is_error_condition_enum",
+    "is_execution_policy",
     "is_final",
     "is_floating_point",
     "is_function",
     "is_fundamental",
+    "is_implicit_lifetime",
     "is_integral",
     "is_invocable",
     "is_invocable_r",
@@ -65,14 +73,17 @@ static const llvm::StringSet<> ValueTraits = {
     "is_nothrow_invocable_r",
     "is_nothrow_move_assignable",
     "is_nothrow_move_constructible",
+    "is_nothrow_relocatable",
     "is_nothrow_swappable",
     "is_nothrow_swappable_with",
     "is_null_pointer",
     "is_object",
+    "is_placeholder",
     "is_pointer",
     "is_pointer_interconvertible_base_of",
     "is_polymorphic",
     "is_reference",
+    "is_replaceable",
     "is_rvalue_reference",
     "is_same",
     "is_scalar",
@@ -91,15 +102,26 @@ static const llvm::StringSet<> ValueTraits = {
     "is_trivially_destructible",
     "is_trivially_move_assignable",
     "is_trivially_move_constructible",
+    "is_trivially_relocatable",
     "is_unbounded_array",
     "is_union",
     "is_unsigned",
+    "is_virtual_base_of",
     "is_void",
     "is_volatile",
     "negation",
     "rank",
+    "ratio_equal",
+    "ratio_greater_equal",
+    "ratio_greater",
+    "ratio_less_equal",
+    "ratio_less",
+    "ratio_not_equal",
     "reference_constructs_from_temporary",
     "reference_converts_from_temporary",
+    "tuple_size",
+    "uses_allocator",
+    "variant_size",
 };
 
 static const llvm::StringSet<> TypeTraits = {
@@ -130,6 +152,12 @@ static const llvm::StringSet<> TypeTraits = {
     "result_of",
     "invoke_result",
     "type_identity",
+    "compare_three_way_result",
+    "common_comparison_category",
+    "unwrap_ref_decay",
+    "unwrap_reference",
+    "tuple_element",
+    "variant_alternative",
 };
 
 static DeclarationName getName(const DependentScopeDeclRefExpr &D) {

clang-tools-extra/clang-tidy/modernize/UseUsingCheck.cpp

@@ -119,7 +119,8 @@ void UseUsingCheck::check(const MatchFinder::MatchResult &Result) {
   if (StartLoc.isMacroID() && IgnoreMacros)
     return;
 
-  static const char *UseUsingWarning = "use 'using' instead of 'typedef'";
+  static constexpr llvm::StringLiteral UseUsingWarning =
+      "use 'using' instead of 'typedef'";
 
   // Warn at StartLoc but do not fix if there is macro or array.
   if (MatchedDecl->getUnderlyingType()->isArrayType() || StartLoc.isMacroID()) {

clang-tools-extra/docs/ReleaseNotes.rst

@@ -281,6 +281,9 @@ Changes in existing checks
   excluding variables with ``thread_local`` storage class specifier from being
   matched.
 
+- Improved :doc:`modernize-type-traits
+  <clang-tidy/checks/modernize/type-traits>` check by detecting more type traits.
+
 - Improved :doc:`modernize-use-default-member-init
   <clang-tidy/checks/modernize/use-default-member-init>` check by matching
   arithmetic operations, ``constexpr`` and ``static`` values, and detecting

clang-tools-extra/docs/clang-tidy/checks/modernize/type-traits.rst

@@ -38,3 +38,10 @@ Options
     #define IS_SIGNED(T) std::is_signed<T>::value
 
   Defaults to `false`. 
+
+Limitations
+-----------
+
+Does not currently diagnose uses of type traits with nested name
+specifiers (e.g. ``std::chrono::is_clock``,
+``std::chrono::treat_as_floating_point``).

clang-tools-extra/test/clang-tidy/checkers/modernize/type-traits.cpp

@@ -1,7 +1,7 @@
 // RUN: %check_clang_tidy -std=c++14 %s modernize-type-traits %t -check-suffixes=',MACRO'
 // RUN: %check_clang_tidy -std=c++14 %s modernize-type-traits %t -- \
 // RUN:   -config='{CheckOptions: {modernize-type-traits.IgnoreMacros: true}}'
-// RUN: %check_clang_tidy -std=c++17 %s modernize-type-traits %t -check-suffixes=',CXX17,MACRO,CXX17MACRO'
+// RUN: %check_clang_tidy -std=c++17-or-later %s modernize-type-traits %t -check-suffixes=',CXX17,MACRO,CXX17MACRO'
 
 namespace std {
   template <typename>
@@ -19,6 +19,11 @@ namespace std {
     using type = T;
   };
 
+  template <typename...>
+  struct common_type {
+    using type = int;
+  };
+
 inline namespace __std_lib_version1 {
   template<typename T>
   struct add_const {
@@ -66,6 +71,10 @@ using UsingNoTypename = std::enable_if<true>::type;
 // CHECK-MESSAGES: :[[@LINE-1]]:25: warning: use c++14 style type templates
 // CHECK-FIXES: using UsingNoTypename = std::enable_if_t<true>;
 
+using VariadicTrait = std::common_type<int, long, bool>::type;
+// CHECK-MESSAGES: :[[@LINE-1]]:23: warning: use c++14 style type templates
+// CHECK-FIXES: using VariadicTrait = std::common_type_t<int, long, bool>;
+
 using UsingSpace = std::enable_if <true>::type;
 // CHECK-MESSAGES: :[[@LINE-1]]:20: warning: use c++14 style type templates
 // CHECK-FIXES: using UsingSpace = std::enable_if_t <true>;

clang/docs/ReleaseNotes.rst

@@ -678,6 +678,12 @@ Improvements to Clang's diagnostics
 - Clang now accepts ``@tparam`` comments on variable template partial
   specializations. (#GH144775)
 
+- Fixed a bug that caused diagnostic line wrapping to not function correctly on
+  some systems. (#GH139499)
+
+- Clang now tries to avoid printing file paths that contain ``..``, instead preferring
+  the canonical file path if it ends up being shorter.
+
 Improvements to Clang's time-trace
 ----------------------------------
 
@@ -761,6 +767,11 @@ Bug Fixes in This Version
   flag and diagnostic because the macro injection was used to emit this warning.
   Unfortunately there is no other good way to diagnose usage of ``static_assert``
   macro without inclusion of ``<assert.h>``.
+- In C23, something like ``[[/*possible attributes*/]];`` is an attribute
+  declaration, not a statement. So it is not allowed by the syntax in places
+  where a statement is required, specifically as the secondary block of a
+  selection or iteration statement. This differs from C++, since C++ allows 
+  declaration statements. Clang now emits a warning for these patterns. (#GH141659)
 
 Bug Fixes to Compiler Builtins
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -914,6 +925,9 @@ Bug Fixes to C++ Support
 - Correctly handle allocations in the condition of a ``if constexpr``.(#GH120197) (#GH134820)
 - Fixed a crash when handling invalid member using-declaration in C++20+ mode. (#GH63254)
 - Fix a crash when trying to instantiate an ambiguous specialization. (#GH51866)
+- Improved handling of variables with ``consteval`` constructors, to
+  consistently treat the initializer as manifestly constant-evaluated.
+  (#GH135281)
 
 Bug Fixes to AST Handling
 ^^^^^^^^^^^^^^^^^^^^^^^^^